From the ad:
This Z28 is a very, very rare early 1969 Van Nuys California built “L” code car.
There were 31,163 '69 Camaros built at Van Nuys; not rare at all. It is also a late production car, built on or about April 11, 1969.
No mention of a Body Broadcast Copy commonly found on Van Nuys built Camaros. No original docs. No VIN stamped drive train components. Axle was cast in January, 73 days prior to estimated final assembly. Where is proof this is really a Z/28?